<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        /**
         *                快捷键
         *  1. 多行注释 : shift + alt + a
         *  2. 单行注释 : ctrl + /
         * 
         */

        //alert(333) dsfjasdklfjasdklfjsdklajfklasdjf  a sjkdlfjasdlkfjkasldj f
        alert(444)

    </script>
</body>
</html>